Concealed, or hidden, fastened panels are installed with fasteners that do not penetrate the exposed portion of the metal. The attachment mechanism is hidden from the elements and view, and so provides a sleek aesthetic and the ultimate in weather and water protection.

Gauge

This term refers to the thickness of the panel.

Gauge is the measurement of sheet metal thickness and is an important consideration when choosing a metal roof. With metal, the higher the gauge number, the thinner the material. So 29 gauge is thinner than 26 gauge. For residential roofing, 29 gauge is the minimum recommended, while 26 gauge is suitable for most applications. In areas with high winds, incidence of hail or severe weather, 24 gauge is advisable.

Coatings

A multi-layer color system which helps to preserve and increase the performance of your metal roofing system.

Metal Sales offers two excellent coating systems to deliver high-performance color choices. High performance polyvinylidene fluoride or PVDF (Kynar 500®) is available on both 24 and 26 gauge products and MS Colorfast45® is available on 26 and 29 gauge products. Both coating systems feature multi-layer protection and are warranted for long lasting durability and chalk and fade resistance.

PVDF:

45 Year Finish Warranty

Chalking - will not chalk in excess of number 8 rating for a period of 35 years (determined by ASTM 4214 Method A)

Fading - Will not fade in excess of more than 5 Hunter units for a period of 35 years (determined by ASTM method 2244)

MS Colorfast45®:

45 Year Finish Warranty

Chalking - Will not chalk in excess of number 7 rating on non-vertical applications for a period of 30 years (as determined by the procedure outlined in ASTM 4214 Method A)

Fading - Will not fade in excess of more than 6 NBS Units on non-vertical applications for a period of 30 years (determined by ASTM 2244)

"Fading" refers to a loss of color. "Chalking" is a white haze that may appear on the surface through natural oxidation.